Non-skidding tire.



E. KEMPSHALL.

NoN SKIDDING TIRE 4 vAPPLICATION FILED AAPB. 20,1998.

- Patented Apr. 6, 1909.

jzeses: fl/MQUPmQlT/M d4 GEM To all, whom it may coa-cera:

4ELEAZER KEMPsHALL,

PATENT oEEroE.'

OF LONDON, ENGLAND.

NON-SKIDDIN G TIRE Be it known that I, ELEAZER KEMPSHALL, a citizen oi'the United States of tineric-a, and residing at the Hotel' Russell,VRussell Square, London, it". C., England, have invented certain new anduseful Improvements in Nen-Skidding rlires, of vwhich the following is aspecification.

Pneumatic tires which have thickened tread portions, and sides or barrelportions which gradually taper in thickness toward the rini or telly,are admittedly advantageous as compared With .tires which are of equalthickness throughout, or substantially so, especially for automobiles.But I have found that the heavy tread causes great stress to he thrownon the relatively Weak side portions so as to frequently break thelatter down. Y

When the tread surface of such a tire is 'formed with recesses which actas suction chambers when coming in contact With the road and when thereis a tendency 'to s'f-id that is resisted by thesuction chambers, thereis a still greater tendency to break the tire down along its weak side.K

This invention relates to pneumatic tires of the general type abovereferred to and having a continuous flat tread surface in the form of araised ridge `provided with numerous recesses which yact like suctionchambers as the tire comes into contact with the road and preventsskidding or side-slipping.

l The object of the present invention is to increase the strength of thetire and also to increase the cooling elie'ct While running and theinvention consists in providing a Anumber of ribs extending from thesides of the ridge forming thetread for a considerable distance acrossthe barrel portion of the tire.

Of the accompanying drawings which illustrate a tire constructedaccording to the invention- Figure 1, represents a cross-scction. `Fig.2, a plan, and Fig. 3, a side elevation of a, tire-constructed inaccordance With my invention. i Y

In carrying out the invention a pneumatic Specification ofLettersPatent.

Application led April 20,

Patented April e, 1909.

1908. -Serial N0. 428,277.

tire having a thick tread portion a and side or barrel portions g whichtaper in thickness 'away Vfrom 'the tread, is provided with a raised.ridge b forming the tread surface, this ridge being provided withnumerous recesses d which act like suction chambers as the tire cornesin Contact with the road.

The sides of the ridge b are buttressed by ribs e extending down thesides of the barrel portion g of the tire.l rThese ribs may be beveledat their upper ends as indicated at t', or rounded, and they taper of?toward their ends f near the beaded or other edges 7L of the .tire.`

rthe ribs e not only greatly increase the strength of the tire but theyoffer considerable area of cooling surfaceto the air so as to preventthe tire becoming over-heated when running.

.frnother advantage of the. ribs e is that they distribute the stress ofpressure from the thicktread to the thinner sides in substantialproportions to the tapering thickness of the side walls g, so thattendency ol' the thin portions to break down is overi come, and thisWithout altering the relative resilience of different portions of thetire.

Having now described my invention, wh at l claiin is A pneumatic tirehaving a thick tread portion and sides which taper in thickness awayfrom the tread, the tread being provided with a series of recesses, anda pair ot' side ribs on opposite sides of each recess, said ribs beingtapering in thickness with their smaller' or thinner ends near the edgesof the tire, their' thick outer ends joining the walls of the recessesand reinforcing them laterally.

vIn testimony whereof I have signed .my

Witnesses A. W. MATHYs,

B. H. MATTHEWS.

name-to' this specification in the presence ot'

